This is Viewnior, an image viewer program. Created to be simple, fast
and elegant. It's minimalistic interface provides more screenspace for
your images. Among its features are:

  * Fullscreen & Slideshow
  * Rotate, flip, crop, save, delete images
  * Animation support   
  * Browse only selected images
  * Navigation window
  * Set image as wallpaper (GNOME 2, GNOME 3, XFCE, LXDE, FluxBox)
  * Simple interface
  * Configurable mouse action
